Sodium hypophosphite

CAS 7681-53-0

Sodium hypophosphite is an emulsifier stabiliser and preservative aid, used in a small number of processed products.

Where it is and isn’t permitted

Status of Sodium hypophosphite by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationPermitted21 CFR 184.1764retrieved 2026-09-07
Codex AlimentariusCodex Alimentarius Commission / JECFANot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.

What it is made from

Produced by reacting white phosphorus with an alkali.

  • Vegan
  • Vegetarian
CAS registry number
7681-53-0
InChIKey
ZGKNDXOLMOFEJH-UHFFFAOYSA-M
PubChem
CID 23675242

Every name it appears under

17 recorded names. A label may use any of them.

CAS registry number

  • 7681-53-0

As it appears in regulation

  • Sodium hypophosphite

Other names

  • Hypophosphorous acid monosodium salt
  • Monosodium hypophosphite
  • NaO2P
  • Natriumhypophosphit
  • Phosphinic acid monosodium salt
  • Phosphinic acid, sodium salt
  • Sodium hydrogen phosphite (NaH2PO2)
  • Sodium hydrophosphite
  • SODIUM HYPOPHOSPHITE
  • Sodium hypophosphite (NaH2PO2)
  • Sodium phosphenite
  • Sodium phosphinate
  • Sodium phosphinate (NaH2PO2)
  • sodium;oxido(oxo)phosphanium
  • ZGKNDXOLMOFEJH-UHFFFAOYSA-M

Hazard reference values

No reference value for this substance in the sources we hold.

Evidence and how bodies read it

Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.

Sources for this page

  • ecfr retrieved 2026-09-07

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable:/api/v1/additives/sodium-hypophosphite.json